JPS6010620B2 - copying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus that enables dual-sided copying and single-sided copying and page alignment.

In the case of single-sided copying and double-sided copying, the copy paper is ejected with the front and back sides different.

In the case of one-sided printing, this phenomenon usually occurs on the side with the transferred image (
The paper is sent to the paper ejection slot with the front side (this is defined as the front side) facing up, but if it is transferred to both sides, it is sent to the 9E paper slot with the transferred side (back side) facing up. By being sent.

To explain this with reference to FIG. 1, C2, . . . When copies are made in order, "The side of the copy paper C, on which the first transfer was performed, that is, the side P on which the first page of the original was copied, is facing downward. The surface facing upward is the surface P2 that has been transferred for the second time, that is, the surface P2 on which the second page of the manuscript has been transferred.Similarly, the second copy paper C
2, the downward side is the side P3 where the third page of the manuscript is copied.
The surface facing upward is the surface P4 on which the fourth page of the original is copied.

That is, since the copies are double-sided, they are all stacked on the output tray 1 with the front side facing down and the back side facing up. When the last sheet of copy paper Cn is reached, if the last page of the manuscript is an even number, in this case as well, it will be copied on both sides and ejected, so the order of copying will be complete. If the number of pages is an odd number, the copy will be one-sided, and the copy will be ejected with the side Pn on which the last page was copied facing upward.

That is, in the last copy paper Cn, the copy papers C,, C, which were stacked on the ejection tray and were sequentially following the output from the bottom.
However, in the last copy sheet Cn, there is a blank page between the last copy sheet and the previous page.

Therefore, even if the last page of the original to be copied is an odd numbered page, the functions of the image-forming devices are temporarily stopped so that the copy is made on both sides, and subsequent copies are made as blank pages.

As a result, in the copy paper Cn discharged onto the discharge tray 1, the surface on which the final page of the original is copied is continuous with the surface on which the immediately previous page is copied. If the above-mentioned measures are not taken within the main body of the copying machine, a collator may be connected and a predetermined copy sheet may be reversed within the collator. SUMMARY OF THE INVENTION The present invention aims to solve this problem and provide a copying machine that enables highly efficient page alignment copying from a multi-page original, and the copying machine main body has two modes: a first mode of double-sided copying; , the copy paper is fed along the double-sided copying path, but when copying the side that is left blank, the user can freely select between a second mode in which the image forming devices are not activated, and a third mode in which the paper is ejected after only one-sided copying. In the case where a collator is attached, the purpose is achieved by making the collator capable of reversing and non-reversing distribution from the paper feed path to the next module collator. Hereinafter, the present invention will be described by way of examples with reference to the drawings.

FIG. 2 shows a standard paper feed path for double-sided copying.

FIG. 3 shows a copying apparatus according to the present invention in an explanatory view of the internal mechanisms of a copying machine main body A and a collator B. In FIG. Copy machine body A
has a document mounting surface 2, a light source lamp 3, an optical system 4, a photosensitive drum 5, a developing section 6, a cleaning section 7, a transfer section 8, a fixing section 9, etc. C
is attracted by the vacuum conveyor 11 and sent between the guide rollers 12 and 12, contacts the photosensitive drum 5 along the guide 13, and is transferred as it passes through the transfer section 8. Then, the image is fixed in the fixing section 9. After that, "Buffer Tray 14"
By switching the selection guide 16, the paper feeding for double-sided copying, which is sent to It makes it possible.

In the paper feed path 1 leading from the vacuum conveyor 1 to the transfer section 8, a single-sided copy sheet C placed in a buffer tray 14 is sent onto the vacuum conveyor 11 by an upwardly removable roller 17. It is then turned inside out and fed.

By switching the selection guide 16, the paper transport path from the fixing unit 9 to the buffer tray 14 is switched to the paper transport path m to the paper discharge row 5. The paper discharge row 5 is connected to the upper side of the copying machine main body A, and is connected to the paper feed row 8 of the collator B.

The collator B horizontally feeds the double-sided or single-sided copy paper supplied from the paper feed row 8, and sends it to the paper discharge row 9, which has a spout at the same height position on the opposite side. It has a feeding path W that allows for Directly below the paper feed path W, multistage bins 20 are provided.

Each bin has a checkpoint on both the left and right sides, and can freely accept copy sheets from the reverse transfer paper path V branched from the consignment paper path N and the non-reverse transfer paper path. As shown in detail in FIG. 4, a selection guide 21 that swings to form a path 20a to the bin 20 is provided at the branching portion from the paper feed path W to the non-transfer paper path V and the non-reverse transfer paper path. 22 are provided.

Furthermore, a bin selection guide 23 and a guide roller 24 are provided at the entrance of each pin 20, so that the copy paper sent is
It is designed to be distributed and supplied to each bin according to a fixed order.

Note that the collator B may be connected as the next module collator to a collator B of the same type or a collator of a different type that can be connected to the paper feed port to the pseudo paper port.

Since the copying apparatus of the present invention has the above-described configuration, when new copy sheets C are taken out one by one from the paper feed tray 10 and passed through the paper feed path 1, the original on the original layer surface 2 (not shown) ) image is transferred.

At this time, if the first mode (duplex copying mode) is set in advance, the copy paper C that has been copied on one side enters the paper feed path depending on the position of the selection guide 16, and is stored in the buffer tray 14. Ru. The image of the first page of the original is copied onto the copy paper C in the buffer tray 14. The set number of copies (corresponding to the desired number of copies) is set on the buffer tray 14.
When the copy sheets C are supplied to the buffer tray 14, the roller 17 is lowered and the copy sheets C are sequentially taken out from the buffer tray 14 by its rotation.

The copy paper C in the buffer tray 14 has the copied screen facing upward.

The taken out copy paper C passes under the end of the paper feed path 0 facing the buffer tray 14, and is transferred to the vacuum conveyor 11.
It is absorbed and turned inside out.

The copy paper C fed into the paper feed path 1 is turned over, and the second page of the original is transferred and fixed on the opposite side (front side) of the previously copied side (front side). The paper is supplied to the paper feeding path m by the guidance of the selection guide 16 which has already been switched. The copy paper supplied to the paper feed path m enters the paper feed port 18 of the collator B from the paper discharge port 15.

At this time, the side of the copy paper on which the copy was later transferred, that is, the side on which the second page of the original was copied, faces upward.

Therefore, the copy paper that has entered the paper feed port 18 is synchronously switched to open the non-reverse transfer paper path and is guided by the selection guide 22, which closes the paper feed path W, to the non-reverse transfer paper path. enter.

The copy paper guided to the non-reverse transfer paper path is sequentially transferred from the upper pin 20 to the lower bin 20 by opening the bin selection guide 23 at the entrance of each bin starting from the upper one in a relay manner. Supplied one by one.

Now, if the number of bins of collator B is 20 and the number of copies is 30, there is no bin that can accommodate the 21st copy sheet.

At this time, if the sequence is such that the selection guide 22 is switched, the copy sheets after the 21st sheet enter the paper feeding path W.

In the collator B of the first module in which all the bins 20 are already blocked, when the selection guide 22 is switched in the direction of opening the paper feed path W as described above, the selection guide 21 is switched in the direction of closing the counter transfer paper path V. It will not be possible to switch to

As a result, copy sheets after the 21st sheet are transferred to the paper feed path N.
is supplied to the next module's collet B via a passageway, and is supplied to each of its bins.

If the next module collator B also has 20 bins, the remaining 21
The copy sheets from the 3rd sheet to the 3qth sheet are stored in the respective bins of collator B. When the copy paper on which the first and second pages of the manuscript have been copied as described above has been stored in the collators 8 and B, the third page of the manuscript is placed on the manuscript board 2 and copying begins. When this signal is given, the third page of the original is transferred onto one side of the copy paper C taken out from the paper feed tray 10 in the same manner as described above, and the predetermined number of copies (30 in this case) are completed. The fourth page is then transferred to the back side.

After double-sided copying, each copy sheet is sent to collator B in the same manner as described above, and after being distributed to the pins 20 of collator B, it is distributed to the bins of the next module collator B.

Similarly, when the last page of the original is reached, if the last page of the original is an odd number, only one side will be copied and sent to collator B, but in this case as well, both sides will be copied and placed on the copy paper in the buffer tray 14. pass through.

However, in this case, all the image forming devices temporarily stop their functions.

As a result, the copy paper is placed in the paper feed path 1 with the back side transfer orientation.
It is sent to collator B in a blank state that is not copied even if it is sent to collator B.

Therefore, the copy sheets stacked in the bins 20 of collator B can be stacked one copy at a time in each bin 20 without the pages being misaligned.
01 is organized.

Next, in the case of one-sided copying, the copying machine main body A is set to one-sided copying mode, and V is supplied to the collator B via the direct paper feed path m.

At this time, since all the copied sides are facing upward, when the first page of the original is copied, the pages are reversed and overlapped in the bin 20.

Therefore, in this case, the reverse transfer paper path V is used and the paper is stored in the bin 20 with the copy side facing downward.

As a result, the pages within each bin 20 are correctly aligned and overlapped. If the last page of the original is an odd number, in addition to making a double-sided copy without having the image forming function as described above, you can make a single-sided copy and use the anti-transfer paper path V of collator B. However, page alignment may be performed.

As is clear from the above description, the copying apparatus of the present invention is capable of highly efficient page alignment copying, and is particularly capable of processing the last odd-numbered page by temporarily stopping the functions of the image forming devices while double-sided copying is being performed. This has an excellent effect of saving time required for finishing a blank sheet.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view illustrating the overlapping of double-sided copy sheets on the output tray, FIG. 2 is a diagram illustrating the process of double-sided copying, FIG. 3 is a front view illustrating the internal mechanism of the apparatus of the present invention, and FIG. 4 is a detailed view of the bin selection guide section. A... Copying machine main body, B... Collector, 2... Manuscript lectern, 3... Light source lamp, 4... Optical system, 5... Photoreceptor drum, 6
...Development section, 7.Cleaning section, 8.Transfer section, 9.
... Fixing unit, 10... Paper feed tray, 11... Vacuum conveyor, 12... Guide roller, 13... Guide, 1
4... Buffer tray, 15... 9E paper slot, 16... Selection guide, 17... Roller, 18... Paper feed slot, 19... 9E paper slot, 2
0...Bin, 21, 22, 23...Selection guide "24
...Guide roller, 1,0,m,N,V,...Paper feeding path. Stock Z Diagram 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A paper feed path that transfers and fixes onto one side of the copy paper taken out from the paper feed tray and distributes the paper to the buffer tray and paper output port, and the copy paper taken out from the buffer tray as described above. Equipped with a means to reversely feed paper into the paper feed path, it can perform double-sided copying via a buffer tray, single-sided copying by temporarily stopping the functions of image forming devices regardless of via the buffer tray, and direct paper output tray without going through a buffer tray. A copying apparatus characterized in that page alignment is performed by selecting between single-sided copying and paper feeding. 2. A paper feed path that transfers and fixes onto one side of the copy paper taken out from the paper feed tray and distributes the paper to the buffer tray and paper ejection port, and feeds the copy paper taken out from the buffer tray face-up to the paper feed path. a copying apparatus main body comprising a means for performing a paper feed, a paper feed port connected to the paper ejection port, a paper feed path connecting a paper ejection port corresponding to the paper ejection port, and a paper feed path branching from the paper feed path. It connects a collator equipped with a reversing and non-reversing transfer paper path and multiple pins, and can perform two-sided copying via the buffer tray in the copying machine itself, and one-sided copying by temporarily stopping the functions of the image forming devices regardless of the buffer tray. A copying apparatus characterized in that page alignment is performed by selecting between copying and single-sided copying in which paper is sent directly to a paper output tray without passing through a buffer tray, and by selecting reversal and non-reverse transfer paper in a collator.